(19)
(11) EP 0 972 336 A1

(12)

(43) Date of publication:
19.01.2000 Bulletin 2000/03

(21) Application number: 99905547.8

(22) Date of filing: 29.01.1999
(51) International Patent Classification (IPC)7H03D 7/12
(86) International application number:
PCT/US9901/986
(87) International publication number:
WO 9939/431 (05.08.1999 Gazette 1999/31)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 01.02.1998 US 16629

(71) Applicant: Watkins-Johnson Company
Gaithersburg, MD 20878-1794 (US)

(72) Inventors:
  • VICE, Michael, Wendell
    El Granada, CA 94018 (US)
  • DEXTER, Charles, Edward
    Highland, MD 20777 (US)

(74) Representative: McLeish, Nicholas Alistair Maxwell et al
Boult Wade Tennant27 Furnival Street
London EC4A 1PQ
London EC4A 1PQ (GB)

   


(54) RADIO SYSTEM INCLUDING FET MIXER DEVICE AND SQUARE-WAVE DRIVE SWITCHING CIRCUIT AND METHOD THEREFOR